Scraper for galvanizing-pots.



J. A. HANLON.

SCRAPER FOR GALVANIZING POTS. APPLICATION FILED SEPT. 18. 1912.

l lfififiggn Patented Apr. 20, 191.5.

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PENNSYLVANIA, 'ASSIGNOB. 'ro Eamon-enema? GALVG COMPANY, OF PITTSBURGH,PENNSYLVANIA, A. CORBOTION @F rnnnsnvnma.

To all whomz't may concern:

Be it known that I, JOHN A. HANLON, a resident of Pittsbu' h, in thecounty of Allegheny and State Pennsylvania, have invented a new anduseful Improvement in Scrapers for Galvanizing-Pots, of which thefollowing is a specification. v v

This invention relatesto apparatus for coating strips or sheets of steelor iron with metal, and particularly to a scraping or wiping device forremoving the surplus coating metal.

The object is to produce simple and eifec tive apparatus for scrapingofi or removing from the strip or sheet the superfluous coating "metaland dross and pressing the remaining coating metal into the pores of thebase metal to leave a thin closely adhering coat which will' not crackor peel ofi' when the sheet or strip is bent.

In the accompanying drawings Figure 1' is a longitudinal section througha coating tank or kettle with my improved scraping device therein; Fig.2 is a plan view of the scraping device; Fig. 3 is a transverse sectiontaken on the line 33, Fig. 2, looking in the direction of the arrows,one of the levers being shown in dotted lines in raised position; Fig. 4is a longitudinal section on the line 4r4:, Fig. 2; and Fig. 5 is anenlarged longitudinal section on the line 5-5, Fig. 2.

In the drawings, 1 indicates a suitable metal kettle or tank mounted ina setting 2 and containing the spelter or other molten coating metal 3,all as is usual in the art of coating with metal. Located in the kettleor tank near one end thereof is a transverse support for the scrapindevice, said support comprising a bar having upwardly turned endportions 4* shown as secured to the side walls bf the tank or kettle butwhich may be supported on the settin 2 or in any suitable way.

he scraping device comprises a metal frame composed of two side members5 and transverse members 8, 8 suitably secured to the side members. Theforward ends of the side members are providedwith-downwardly bent hooks6 to engage the supporting bar at, while their rear ends form handles7'by means of which the scrapin device can be lifted out of the pot andp aced in position therein. The supporting bar 4 is preferably 10-Specificafion of Letters Patent.

shown at A, Fig. 3, it can semen ron GALVANIZING-POTS.

;rear of the transverse bars being offset upwardly, as at 19, with theirrear ends or handles 7 resting on the setting'2.

The scraping devices are supported on the transverse members 8, 8 and inthe drawings four sets of scraping devicesare" shown, two on'each sideof central line of the device and one pair in advance of the other, sothat each strip or sheet being coated is subjected to the-action of twoscraping devices. All of the scraping devices are alike so that adescription of one suffices.

Each scraping device comprises a bottom blade or scraper 13 carried by aplate 12 secured to the transverse members 8, 8 and a cooperating upperblade or scraper 14= carried by a ever 15 pivotally connected at itsinner end at 11 to theupper end of a screw 11 engaging a threaded holein the horizontal portion of "an angle bracket 9 secured .to atransverse. member 8 or 8*.at its longitudinal center. The scrapers orblades 13 and Mare, suitably secured to their supports so as'to be rigidtherewith and removable therefrom and eachtpairis of suiiicient lengthto permit the passage of a plurality of strips 20 being coated. Thesescrapers or blades are preferably formed of rolled steel having eitherflat or slightly rounded edge portions between Patented Apr. 2t), 1215.npl lication filed September is, 1912. SerialNo. 721,079;

the longitudinal which the strips or sheets being coated are drawn. Thevertically adjustable pivot member 11 provides a suitable means forkeeping the edges of the'scraping blades in parallelism irrespective ofthe thickness of the strips or sheets passing therebetween. By liftingthe lever to 'vertlcal position, as

be readily rotated' to either elevate or lower the pivot 11, and adjustthe scrapers to the thickness of the sheet or strip being coated.. Theouter ends of the levers 15 are offset upwardly to pass over the side.walls of the kettle or tank and form lever arms 16 for the applicationto the scrapers of the necessary pressure to remove the surplus coatingmetal and press the remainder into the pores of the metal. This pressuremay be applied either by hand or by weight, as indicated at 17, attachedto a hole 17 in the outer end of said lever arms. The lever arms areguided vertically between spaced vertical guide. members 18 secured tothe.

frame side members 5 and to the transverse members 8 and 8.

In the use of the apparatus,.the scraping device is placed in positionin the pot and strips or sheets of metal 20 to be coated are led fromsuitable rolls or reels through the pot and through the two tandempairsof scrapers to a suitable winding or other traction mechanism. Thedevice is intended particularly for coating long strips of metal, suchas hoop or band iron or the like, which in use must be bent and whichshould be capable of being bent at a sharp angle without cracking,crazing or peeling the coating metal. The drawings show three strips 20,

such as hoop or band iron, passing through each pair of scrapers, butobviously, t e scraping device can be made of such size as toaccommodate any desired number of strips 6r sheets. After the strips orsheets are passed through the scraping device and connected, .toasuitable winding or other traction device, weight is applled to thehandle levers v16 of the upper scrapmg blades to press them down uponthe strips with sufiicient force to remove the surplus coating metal anddross from. both sides of the. strips and thin and spread the remain ingcoating metal and force it into the pores of the strip. The formation ofthe edges of thescraping blades and the pressure applied to the scrapersis such as to form a very th n unbroken coating of metal on the strip orheat and which very tenaciously adheres thereto so that it will notcrack or peel when the strip is bent even to sharp angles. e blades areof such formation as to prevent excessive coating metal from passingthrough them and that which is scraped off drops back into the tank orkettle. The first set of scrapers takes off the major portion of theexcess coating metal, leaving merely a thin film, while the succeedingscraper further reduces this film, spreads and compacts the same'andforces it into the pores of the metal so that a very firm physical bondis formed between the base metal';and the coating.

' While round edged scrapers may be used and will accomplish the desiredresults with some degree of success, I prefer to use scrapers or bladeshaving substantially square or flat scraping edges, as shown in crosssection inFig.4=.' V 0 The devicedescribed is simple and inexpensive andresults in a considerable saving in the amount of metal necessary tosecure a good protecting coat for the strip or sheet. It can be operatedat a high speed, as its action is not limited by the ability of themovable wiping member. v

in'connectlon with sides forcing the coating metal 7 into pores of thebase metal to form a more .umform and tenacious coating.

What I claim is 1, Wiping apparatus for use in galvanizing strips,comprising a frame, afixed wiping member secured therein and adapted-towipe over one surface of the strip, acoiipe ating wiping member for theother surface of the strip and movable toward and from said fixedwiping, member, a lever arranged to swing in a vertical plane andcarrying said movable wiping member, and a threaded pivot member carriedby the frame .with its axis vertical and supporting said lever, saidpivot member being threaded into the frame and adjustable verticallytherein,-

whereby said wiping members may be adjusted relatively to each other.

- 2. Apparatus for us i in connection ing a fixed wiping member,avertically movable wiping member cooperating with' said fixed wipingmember, a pivot. member threaded into said frame on a vertical axis andadjustable yertically therein, and a lever' pivotally connected tosaidpivot member on. ahorizontalaxis and carrying said "Apparatus for usegalvanizing pots, comprisinga frame having side members each:terminating at one end in a hook and at its opposite end formmg ahandle, cross bars connecting said side frame members, fixed wipingmembers carried by said cross bars, and movable wiping memberspivotallyfconnected to said crossbars and coiipe'r'ating with said fixedwiping members.

' 4. Wiping apparatus for use ingalvanizing strips, comprising aportable frameadapted to be supported over the galvanizing tank, crossmembers on said frame spaced apart horizontallyand each carrying a fixedwiping member, and levers pivoted in said frame and carryingcotiperating wiping members, said levers being independently adjustablein a vertical, direction to vary the distance between cQapemting wipingmembers of each pair.

5. Wiping apparatus for use in galvanizing strips, comprising a frameadapted to be supported over the galvanizing tank, said frame includinga cross member carrying a plurality of fixed wiping members, a pair oflevers pivoted at or near the middle of. said frame and extending inoppositedirec-' tions laterally thereof, each lever carrying a movablewiping member for coiiperating with one of said fixed wiping members,and threaded members for independently adj 11stingsaid levers verticallyto vary the distance between said wiping members, said 16- versextending in one direction only from the threaded members.

6., Wiping apparatus for use in galvanizing strips, comprising a frameadapted to be supported over the galvanizing tank, said frame includinga cross member carrying a fixed wiping member, a lever carrying amovable wiping member for coiiperation with said fixed Wiping member, asupport to which said lever is pivotally connected, said support beingthreaded into and vertically adjustable in said frame, and verticalguides for said lever, said guides being free of connection at theirupper ends and adapted to permit said lever to be raised and turned on avertical axis to adjust the wiping members relatively to each other.

In testimony whereof, I have hereunto set my hand.

JOHN A. HANLON. Witnesses:

ELBERT L. HYDE, J; L. ITIEFALLER, Jr.

